74LS273 Octal D-type Flip-Flop with Clear


The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS273 monolithic, positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic with direct clear input.

74LS273 Features

  • Eight D-Type Flip-Flops with Common Clock
  • Edge Triggered
  • Parallel In and Out
  • Master Reset
  • Standard TTL Switching Voltages

74LS273 Specifications

Supply Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS273 Pinout Diagram

74LS273 Pin Description

Pin NoPin NameDescription
1MRAsynchronous Master Reset Input
2Q0Register Output
3D0Data Input
4D1Data Input
5Q1Register Output
6Q2Register Output
7D2Data Input
8D3Data Input
9Q3Register Output
11CPClock Pulse Input
12Q4Register Output
13D4Data Input
14D5Data Input
15Q5Register Output
16Q6Register Output
17D6Data Input
18D7Data Input
19Q7Register Output
20VCCPositive Supply


  • Create delay lines which are used in digital signal processing systems

74LS273 Alternative Equivalent

74L174, 74LS175

Download 74LS273 Octal D-type Flip-Flop with Clear Datasheet from the link given below.